oracle.toplink.essentials.internal.identitymaps

Class NoIdentityMap

java.lang.Object

oracle.toplink.essentials.internal.identitymaps.IdentityMap

oracle.toplink.essentials.internal.identitymaps.NoIdentityMap

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public class NoIdentityMap
extends IdentityMap

Purpose: Provide the capability to not cache objects at all.

Responsibilities:

• Do nothing when an object is cached

Since:

TOPLink/Java 1.0

See Also:

Serialized Form

Field Summary

Fields inherited from class oracle.toplink.essentials.internal.identitymaps.IdentityMap

maxSize, searchKey

Constructor Summary

Constructors

Constructor and Description
NoIdentityMap(int size)

Method Summary

Modifier and Type	Method and Description
CacheKey	acquire(java.util.Vector primaryKey) locking for no identity.
void	collectLocks(java.util.HashMap threadList) INTERNAL: Used to print all the Locks in every identity map in this session.
java.util.Enumeration	elements() Allow for the cache to be iterated on.
java.lang.Object	get(java.util.Vector primaryKey) Return the object cached in the identity map Return null as no object is cached in the no IM.
protected CacheKey	getCacheKey(CacheKey searchKey) Return null since no objects are actually cached.
int	getSize() Return the number of objects in the receiver.
int	getSize(java.lang.Class myClass, boolean recurse) Return the number of actual objects of type myClass in the IdentityMap.
java.lang.Object	getWriteLockValue(java.util.Vector primaryKey) Get the write lock value from the cache key associated to the primarykey
java.util.Enumeration	keys() Allow for the cache keys to be iterated on.
void	put(CacheKey key) DO NOTHING
CacheKey	put(java.util.Vector aVector, java.lang.Object object, java.lang.Object writeLockValue, long readTime) DO NOTHING.
java.lang.Object	remove(CacheKey searchKey) Do Nothing Return null, since no objects are cached.
java.lang.Object	remove(java.util.Vector primaryKey) Do Nothing.
void	setWriteLockValue(java.util.Vector primaryKey, java.lang.Object writeLockValue) Update the write lock value of the cache key associated with the given primary key,

Methods inherited from class oracle.toplink.essentials.internal.identitymaps.IdentityMap

acquireDeferredLock, acquireLock, acquireLockNoWait, acquireReadLockOnCacheKey, acquireReadLockOnCacheKeyNoWait, clone, containsKey, createCacheKey, createCacheKey, getCacheKey, getCacheKeyWithReadLock, getDefaultIdentityMapClass, getMaxSize, getSearchKey, getWrapper, initialize, setMaxSize, setSearchKey, setWrapper, toString, updateCacheKey, updateMaxSize

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

NoIdentityMap

public NoIdentityMap(int size)

Method Detail

acquire

public CacheKey acquire(java.util.Vector primaryKey)

locking for no identity.

collectLocks

public void collectLocks(java.util.HashMap threadList)

INTERNAL: Used to print all the Locks in every identity map in this session. The output of this method will go to log passed in as a parameter.

Specified by:

collectLocks in class IdentityMap

elements

public java.util.Enumeration elements()

Allow for the cache to be iterated on.

Specified by:

elements in class IdentityMap

get

public java.lang.Object get(java.util.Vector primaryKey)

Return the object cached in the identity map Return null as no object is cached in the no IM.

Overrides:

get in class IdentityMap

getCacheKey

protected CacheKey getCacheKey(CacheKey searchKey)

Return null since no objects are actually cached.

Specified by:

getCacheKey in class IdentityMap

getSize

public int getSize()

Description copied from class: IdentityMap

Return the number of objects in the receiver.

Specified by:

getSize in class IdentityMap

Returns:

0 (zero)

getSize

public int getSize(java.lang.Class myClass,
                   boolean recurse)

Return the number of actual objects of type myClass in the IdentityMap. Recurse = true will include subclasses of myClass in the count.

Specified by:

getSize in class IdentityMap

getWriteLockValue

public java.lang.Object getWriteLockValue(java.util.Vector primaryKey)

Get the write lock value from the cache key associated to the primarykey

Overrides:

getWriteLockValue in class IdentityMap

keys

public java.util.Enumeration keys()

Allow for the cache keys to be iterated on.

Specified by:

keys in class IdentityMap

put

public CacheKey put(java.util.Vector aVector,
                    java.lang.Object object,
                    java.lang.Object writeLockValue,
                    long readTime)

DO NOTHING.

Specified by:

put in class IdentityMap

Parameters:

aVector - is the primary key for the object.

object - is the domain object to cache.

writeLockValue - is the current write lock value of object, if null the version is ignored.

readTime - the read time of the object to be stored in the cache

put

public void put(CacheKey key)

DO NOTHING

Specified by:

put in class IdentityMap

remove

public java.lang.Object remove(java.util.Vector primaryKey)

Do Nothing. Return null, since no objects are cached.

Overrides:

remove in class IdentityMap

remove

public java.lang.Object remove(CacheKey searchKey)

Do Nothing Return null, since no objects are cached.

Specified by:

remove in class IdentityMap

setWriteLockValue

public void setWriteLockValue(java.util.Vector primaryKey,
                              java.lang.Object writeLockValue)

Description copied from class: IdentityMap

Update the write lock value of the cache key associated with the given primary key,

Overrides:

setWriteLockValue in class IdentityMap